Blade Fold/Unfold and Wing Stow (BFWS) Procedures

Flight Ready to Full Stow
  1. Engine Control Levers – Check OFF

  2. Nr – Check 0%

  3. Rotor Brake – OFF

  4. Battery – Check ON

  5. APU – RUN/Engage

  6. HYD Pressure – Check NORMAL

  7. AREA – CLEAR

  8. MFD -> SYST -> BFWS – SET

  9. FLT RDY – Verify white with *

  10. FULL STOW – Select

  11. ROTOR LOCK – Select on MFD, verify white with *

  12. Observe:

    1. NAC Positioned to 90 deg

    2. Proprotor blades index and lock

    3. Left and right blades fold

    4. Flaps position to 0 deg

    5. Nacelles lower

    6. Wing lockpin retraction

    7. Wing Stow

  13. FULL STOW – Verify white with *

Full Stow to Flight Ready
  1. Engine Control Levers – Check OFF

  2. Nr – Check 0%

  3. Rotor Brake – OFF

  4. Battery – Check ON

  5. APU – RUN/Engage

  6. HYD Pressure – Check NORMAL

  7. AREA – CLEAR

  8. MFD -> SYST -> BFWS – SET

  9. FULL STOW – Verify white with *

  10. FLT RDY – Select

  11. ROTOR LOCK – Select on MFD, verify white with *

  12. Observe:

    1. Flaps positioned to 0 deg

    2. Wing lockpin retraction

    3. Wing unstow

    4. NAC raise to 90 deg

    5. Wing lockpin extension

    6. Blades unfold

  13. FLT RDY – Verify white with *

  14. ROTOR LOCK – Deselect on MFD, verify green

Flight Ready to Fold Horizontal
  1. Engine Control Levers – Check OFF

  2. Nr – Check 0%

  3. Rotor Brake – OFF

  4. Battery – Check ON

  5. APU – RUN/Engage

  6. HYD Pressure – Check NORMAL

  7. AREA – CLEAR

  8. MFD -> SYST -> BFWS – SET

  9. FLT RDY – Verify white with *

  10. FOLD HORIZ – Select

  11. ROTOR LOCK – Select on MFD, verify white with *

  12. Observe:

    1. NAC Positioned to 90 deg

    2. Proprotor blades index and lock

    3. Left and right blades fold

    4. Flaps position to 0 deg

    5. Nacelles lower

  13. FOLD HORIZ – Verify white with *

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